Feed-water heating and purifying attachment for boilers.



W. H. KAY. FEED WATER HEATING AND PURIFYING ATTACHMENT FOB. BOILERSAPPLICATION FILED SEPT Patented Dec. 30, 1913;

COLUMBIA PLANOGRAPH CO.,\VASHINOTON. hv c.

T D STATES WILLIAM H. KAY, 0F WOOIDHAVEN, NEW YORK, ASSIGNOR TO HARRY L.POWELL, OF

BROOKLYN, NEW YORK.

FEED-WATER, HEATING AND PURIFYING ATTACHMENT FOR BOILERS.

osaroe.

Specification of Letters Patent.

Application filed September 9, 1912.

To all whom it may concern:

Be it known that I, WVILLIAM H. KAY, a citizen of the United States,residing at Noodhaven, in the county of Queens and State of New York,have invented new and useful Improvements in Feed-Water Heating andPurifying Attachments for Boilers, of which the following is aspecification.

This invention relates to feed water heating and purifying devices forboilers, and the main objects are to utilize the force of gravitation,instead of working against it, in the separation of sediment and saltsfrom water to a large extent, prior to the filtration of the water andflow thereof into the boiler; to provide a free precipitating operationby means of a simple internal construction; to automatically remove thesediment from the filter by a simple operation; and to insure a thoroughor complete cleaning out of the attachment by eliminating interiorobstructions in the body of the heat ing and settling chamber.

A further object of the invention is to dispose the filter on top of andabove the heating and settling chamber or tank in such a way as toeffect precipitation in the chamber or tank free from any interferenceby the filtering material, and to insure that the escape of the sedimentinto the boiler is not merely obstructed by the filter, but is alsosubstantially prevented by the action of the force of gravitation, asthe particles to escape must not only be forced through the filter, butupwardly through the same.

With these and other objects and advantages in view, the inventionconsists in the construction and arrangement of the several parts whichwill be more fully hereinafter described and claimed.

In the drawing: Figure 1 is a longitudinal vertical broken section of anordinary horizontal boiler showing the improved attachment appliedthereto and correspondingly broken. Fig. 2 is an enlarged longitudinalvertical broken section of the filtering attachment. Fig. 3 is a detailperspective view of one of the foraminate or wire gauze filtering heads.

The numeral 5 designates any preferred type or form of horizontal boilerequipped with the usual flue tubes 6. This boiler n1 ay also be providedwith suitable man-holes or analogous devices for the introduction of theimproved attachment, which will be preferably composed of a number ofsections for convenience in disposing the same within the boiler andalso to assist in the primal structural formation, with advantage from amanufacturing standpoint.

The attachment is suspended by suitable means, such as removable hangers9, from the top portion of the boiler above the flue tubes, and it willbe understood that the attachment may be made as long or as short asdesired and correspondingly increased or decreased in diameter in orderto vary its capacity in accordance with the proportions of the boiler inwhich it is disposed.

The attachment embodies essentially an elongated cylinder or receiver 10having in communication with one end thereof a pipe or tube 11 whichserves as the inlet for the feed water and also as the outlet for thesediment and other accumulations during the blow-off operation. By meansof a suitable unionor fitting 12 a feed water pipe 13 is connected tothe tube or pipe 11 and has a controlling valve 14, and also connectedwith such union or fitting is a blow-off pipe 15 provided with a valve16. During the entrance or supply of feed water to the cylinder orreceiver the valve 16 in the pipe 15 will be closed and necessarily thevalve 14 in the pipe 13 will be opened. The opposite end of the cylinderor receiver 10 is closed and on the top portion thereof, is mounted asection 17 containing suitable filtering material 20. This sectionpreferably consists of a short cylindrical body formed with flanged endsand foraminate or wire gauze covered heads 18 removably fitted in saidends, the lower end being secured to a flanged neck or fixed collar 19rising from the cylinder or receiver 10 any suitable distance. There isno outlet for the feed water from the cylinder or receiver 10 except byway of the filtering section, so that the water has to rise or passupwardly to and then through the filtering section and thence escapeinto the boiler.

When found necessary, the filtering section 17 may be detached from theneck or fixed collar 19 and the heads 18 removed, to clean the filteringmaterial or to replenish or replace such filtering material as may berequired. Suitable metal will be used for forming the parts of theattachment as a whole and the structure is simplified or reduced to aminimum relatively to the number of parts necessary in accordance withthis invention by having the interior of the cylinder or receiver 10wholly free of projecting or auxiliary devices, 71. 6., clear from endto end without obstruction.

The feed water enters the pipe 13 and passes into the tube or pipe 11and [lows into the cylinder or receiver 10, which, as will beunderstood, constitutes a heating and set-' tling chamber. The waterremains in this chamber, which is larger in diameter than the feed pipe,a long enough time to attain a temperature at which salts in solutionprecipitate, and, also, to permit the solids to gravitate or settle.Finally the water moves upwardly through the filtering section 17 and isthoroughly and effectively purified before it passes intothe boiler. Itwill be seen that as the water'is compelled to rise up to and throughthe filtering section in order to escape from the heating and settlingchamber, the work of separating the solids and other matter, such .assediment and precipitated salts, from the water is removedto a largeextent from the filtering section, or the filtering material containedin the latter, and is largely effected by gravitation, the sediment andsolids as well as the salts being almost entirely separated from thewater at the time the latter passes through the filtering material.Hence, the filtering material will not become clogged so rapidly and asa consequence will serve its purpose for a greater length of timewithout cleansing or replenishment. By this means all foreign matter andsolids will be prevented from coming'into contact with the interiorsurface of the boiler, the said solids and foreign matter remaining inthe chamber 10. When it is desired to clean out the attachment as awhole, the valve let in the feed pipe 13 is closed and the valve 16 inthe outlet pipe 15 is opened, whereupon the boiler pressure within theboiler will automatically operate to blow out the accumulated sedimentand foreign matter as well as solids within the chamber 10 by passinginto the latter through the filtering section 17 and driving theaccumulations in the said chamber out through the tube or pipe 11 andinto the pipe 15, and as there are no interior obstructionsin thechamber 10 the sediment or accumulations will be wholly driven out by asimple operation and with certainty.

It will be observed that the cleansing or blowing ofi operation isefiected by simply reversing the pressure during the operation of steamgeneration within the boiler. When the boiler is shut down, theattachment may be removed and cleansed, but as the latter operation willbe carried on only at long intervals, the more important feature of theinvention, so far as cleaning the attachment is concerned, is theutilization of a reversal of pressure as just explained.

It will be noted that the cleaning or blowing off operation is effectedpartly in a downward .and partly in a horizontal direction, and as aconsequence less time will be required in thoroughly cleaning thecylinder 10.- Thisparticularcleaning or blowing off operation isespecially important in the at tachment as disclosed for the reason thatbut a small percentage of the sediment will lodge in the filter, thebulk of the sediment remaining in asemifluid state in the cylinder 10.

here, by reason of the location of the attachment, the outlet willprotrude or projectinto the normal steam space of the boiler, suitablemeans may be employed to convey the purified water into the boilerwater, below the normal water line, to prevent contactwith the steam andundue agitation of the boiler Water in the inlet and blow offoperations. 7

What I claim is:

A feed Water heating and purifying attachment for steam boilersconsisting of an elongated settling and heating chamber interiorly freeof all obstruction to a free circulation of Water therein, said chamberhaving at the upper portion of one end thereof a neck which terminatesabove the top portion of'the chamber and constitutes the sole outletfor the water to be filtered and the sole inlet for the boiler pressure;a combined feed water inlet and sediment and accumulation blow-elf tubeopening into the lowermost portion of the opposite end of said chamberin line with the lower bottom portion of the same to' permit a thoroughcarrying off of the sediment and accumulations therein; and a sectionmounted directly over and detachably secured to the upper terminal ofsaid neck'and disposed wholly exterior of said chamber, said sectioncontaining filtering material, whereby the free passage of the waterthrough said section will be appreciably retarded by the filteringmaterial therein to increase the period during which the water remainsin said settling and heating chamber..

In testimony whereof I have hereunto set my handin presence of twosubscribing witnesses.

WILLIAIVLH. KAY. Witnesses:

ALLEN S. WVENNS, Rosanne LovY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patent; Washington, D. C.

